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diff --git a/doc/conf.py b/doc/conf.py
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+# SPDX-License-Identifier: GPL-3.0-or-later
+# -*- coding: utf-8 -*-
+
+import os
+import re
+import subprocess
+
+import sphinx_rtd_theme
+
+# -- General configuration -----------------------------------------------------
+
+if os.environ.get('READTHEDOCS', None) == 'True':
+    subprocess.call('doxygen')
+
+# Add any Sphinx extension module names here, as strings.
+extensions = ['sphinx.ext.todo', 'sphinx.ext.viewcode', 'breathe']
+
+# Breathe configuration
+breathe_projects = {"libkres": "doxyxml"}
+breathe_default_project = "libkres"
+breathe_domain_by_extension = {"h": "c"}
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+master_doc = 'index'
+
+# General information about the project.
+project = u'Knot Resolver'
+copyright = u'CZ.NIC labs'
+with open('../meson.build') as f:
+    for line in f:
+        match = re.match(r"\s*version\s*:\s*'([^']+)'.*", line)
+        if match is not None:
+            version = match.groups()[0]
+release = version
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+highlight_language = 'c'
+primary_domain = 'py'
+
+# -- Options for HTML output ---------------------------------------------------
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'apidoc'
+
+# Theme
+html_theme = 'sphinx_rtd_theme'
+html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+
+html_theme_options = {
+    'logo_only': True,  # if we have a html_logo below, this shows only the logo with no title text
+    # ToC options
+    'collapse_navigation': False,
+    'sticky_navigation': True,
+}
+html_logo = '_static/logo-negativ.svg'
+html_style = 'css/custom.css'
+
+# -- Options for LaTeX output --------------------------------------------------
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title, author, documentclass [howto/manual]).
+latex_documents = [
+  ('index', 'format.tex', u'Knot Resolver',
+   u'CZ.NIC Labs', 'manual'),
+]
+
+# -- Options for manual page output --------------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'libkres', u'libkres documentation',
+     [u'CZ.NIC Labs'], 1)
+]
+
+# -- Options for Texinfo output ------------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    ('index', 'knot-resolver', u'Knot Resolver', u'CZ.NIC Labs',
+     'Knot Resolver', 'Caching DNS resolver.', 'Network services'),
+]